Abstract
The simultaneous detection of proton-induced X-rays and gamma-rays enables rapid determination of both major and trace elements in thick homogeneous samples. Using protons of energy 2.55 MeV, the atomic numbers of the elements detectable with this technique were Z=3, 5, 9, 11–13 from gamma-ray analysis and Z=13–92 from X-ray analysis. Thick target concentrations were determined from a thoroughly made thin target calibration and from matrix-dependent conversion factors calculated from fundamental parameters. The major compositions of samples needed in these calculations are derived in an iterative procedure using the spectra recorded. The method proposed has been tested on six USGS rock standards. Detection limits for one of the standards are presented. Approximately 20 elements were detected in each sample 5 min irradiations. For elements well above their detection limits, the results are typically accurate to within 5%. The precision of repeated day-to-day analysis is about 2% (one standard deviation).
| Original language | English |
|---|---|
| Pages (from-to) | 531-537 |
| Journal | Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment |
| Volume | 181 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 1981 |
Bibliographical note
The information about affiliations in this record was updated in December 2015.The record was previously connected to the following departments: Nuclear Physics (Faculty of Technology) (011013007), Ergonomics and Aerosol Technology (011025002)
Subject classification (UKÄ)
- Production Engineering, Human Work Science and Ergonomics
- Subatomic Physics
Free keywords
- geologic material
- gamma analysis
- trace element analysis
- PIXE